Convert Ounces to milligrams
1 ounce = 28,349.52 milligrams · mg = oz × 28,349.52313
When you need this conversion
This conversion goes from ounces, the US customary unit for cooking and postage, to milligrams, the unit used for medication doses and nutrition labels. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.
Ounces to milligrams conversion table
| Ounces (oz) | Milligrams (mg) |
|---|---|
| 1 oz | 28,349.52 mg |
| 2 oz | 56,699.05 mg |
| 3 oz | 85,048.57 mg |
| 5 oz | 141,747.62 mg |
| 10 oz | 283,495.23 mg |
| 15 oz | 425,242.85 mg |
| 20 oz | 566,990.46 mg |
| 25 oz | 708,738.08 mg |
| 50 oz | 1,417,476.16 mg |
| 75 oz | 2,126,214.23 mg |
| 100 oz | 2,834,952.31 mg |
| 250 oz | 7,087,380.78 mg |
| 500 oz | 14,174,761.56 mg |
| 1,000 oz | 28,349,523.13 mg |
The formula
mg = oz × 28,349.52313Because both units measure weight, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Milligrams to ounces →Related weight conversions
- Ounces to grams
- Grams to ounces
- Grams to carats
- Kilograms to pounds
- Kilograms to stones
- Metric tons to US tons
- Pounds to kilograms
- Stones to kilograms
- US tons to metric tons
- Carats to grams
- Grams to milligrams
- Kilograms to milligrams
Frequently asked questions
- How many milligrams are in a ounce?
- There are 28,349.52 milligrams in 1 ounce. The formula is mg = oz × 28,349.52313.
- How do you convert ounces to milligrams?
- Use the formula mg = oz × 28,349.52313. For example, 10 ounces equals 283,495.23 milligrams.
- Is the ounces to milligrams conversion exact?
- Yes. Ounces and milligrams are both units of weight, related by an exact defined factor. Displayed results are rounded for readability.
- What is oz short for?
- oz is the standard symbol for ounce. mg is the symbol for milligram.